Heat medium relay unit



FIG. 1 is a front, top and right side perspective view of a heat mediumrelay unit, showing an embodiment of our new design;

FIG. 2 is a rear, top and left side perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken line portion of the figure drawings is included to showunclaimed subject matter only and forms no part of the claimed design.

CLAIM The ornamental design for a heat medium relay unit, as shown anddescribed.